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"Following further investigations with our suppliers, we are confident that the product in question was not sold by Dunelm.

"We have worked with a specific supplier on this type of product since 2012 and have not sold any products that included an inner removable bag, as was the case in this instance.

"Our heatable products include a sewn in label with clear microwave instructions and all Dunelm products go through a thorough, independent testing process which is conducted by the manufacturer, in line with the Company’s quality assurance programme.”

Mrs Sezgin, a nurse, bought the wheat bag two years ago and believed it was purchased at Dunelm Mill in Plymouth. Her daughter Matilda started using the product this winter after it had been left in a cupboard for a while.

The mum of two also posted to Facebook to warn people after she spoke to friends and realised that their younger children were using them at night.

Mrs Sezgin added: "One of my friends put it in her babies cot and I don't think people are aware of the dangers. I was so upset and shocked."

Her Facebook post said: "This is a wheat bag bought for my daughter as I had hoped it would be a safer option than a hot water bottle.

"This morning after using it, she came into my room shocked that her leg was burnt and the bag itself was scorched all over and had burst damaging her bedding and mattress.

"Clearly this horrible incident could have been much much worse or indeed fatal, as you can imagine I am shocked and very concerned about the potential impact for other users.

"The wheat bag was not to my knowledge damaged prior to use or overheated.